Fabricating articulated characters from skinned meshes Journal Article


Author(s): Bac̈her, Moritz; Bickel, Bernd; James, Doug L; Pfister, Hanspeter
Article Title: Fabricating articulated characters from skinned meshes
Affiliation
Abstract: Articulated deformable characters are widespread in computer animation. Unfortunately, we lack methods for their automatic fabrication using modern additive manufacturing (AM) technologies. We propose a method that takes a skinned mesh as input, then estimates a fabricatable single-material model that approximates the 3D kinematics of the corresponding virtual articulated character in a piecewise linear manner. We first extract a set of potential joint locations. From this set, together with optional, user-specified range constraints, we then estimate mechanical friction joints that satisfy inter-joint non-penetration and other fabrication constraints. To avoid brittle joint designs, we place joint centers on an approximate medial axis representation of the input geometry, and maximize each joint's minimal cross-sectional area. We provide several demonstrations, manufactured as single, assembled pieces using 3D printers.
Keywords: fabrication; Animation; Additive manufacturing; Articulated solid models
Journal Title: ACM Transactions on Graphics
Volume: 31
Issue 4
ISSN: 1557-7368
Publisher: ACM  
Date Published: 2012-01-01
Start Page: Article number: 47
Sponsor: This work was partially supported by NSF grant IIS-1116619. Doug James acknowledges support from Pixar and a fellowship from the John Simon Guggenheim Memorial Foundation
DOI: 10.1145/2185520.2185543
Open access: no
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